What is a black Minorca?

Could you please clarify what a black Minorca refers to? Is it a specific type of breed or variety within a larger category? If so, what are its distinguishing characteristics and how does it differ from other similar types? I'm particularly interested in understanding its origins, if any, and whether it holds any special significance or value in the world of animal husbandry or agriculture. Additionally, are there any specific uses or applications for the black Minorca that set it apart from others?